the command to resolve that is
sudo apt-get install libspice-client-gtk-3.0-4=0.20-0nocelt3
and this one to clean eventuality packages no more used
sudo apt-get autoremove --purge
the command to resolve that is
sudo apt-get install libspice- client- gtk-3.0- 4=0.20- 0nocelt3
and this one to clean eventuality packages no more used
sudo apt-get autoremove --purge